Consolidated Balance Sheet (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Common units issued	218,895,515		218,895,515
Units outstanding	218,895,515		218,895,515
Accounts receivable, net	$ 28,488	[1]	$ 48,550	[1],[2]
Other current assets	9,086	[3]	6,998	[2],[3]
Accounts and natural gas imbalance payables	37,297	[4]	25,154	[2],[4]
Accrued liabilities	147,636	[5]	148,600	[2],[5]
Affiliated Entity Member
Accounts receivable, net			17,500
Other current assets	100		400
Accounts and natural gas imbalance payables	7,500		2,500
Accrued liabilities	$ 100		$ 100

[1] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of zero and $17.5 million as of March 31, 2013 and December 31, 2012, respectively.

[2] Financial information has been recast to include the financial position and results attributable to the Non-Operated Marcellus Interest. See Note 2.

[3] Other current assets includes natural gas imbalance receivables from affiliates of $0.1 million and $0.4 million as of March 31, 2013 and December 31, 2012, respectively.

[4] Accounts and natural gas imbalance payables includes amounts payable to affiliates of $7.5 million and $2.5 million as of March 31, 2013 and December 31, 2012, respectively.

[5] Accrued liabilities include amounts payable to affiliates of $0.1 million as of March 31, 2013 and December 31, 2012. See Note 5.